For \(\gamma =[3,0,3-n)\)  with discriminant \(\Delta =n/3\) , the generating function is
[1]}
\(\begin{aligned}h_{3,0} &= (y^{10}+y^8+2y^6+2y^4+2y^2+2+\dots ) q^3 \\& \quad +\left( y^{16}+2y^{14}+5 y^{12}+9 y^{10}+15 y^8+19 y^6+22 y^4+23y^2+24+\dots \right) q^4 + \dots \\&\rightarrow 18 q^3 +216 q^4+1512 q^5 + 8109 q^6 \dots \end{aligned}\) 
